Yes - I did two internships, both were unpaid but got me good experience which helped me juice up my Berkeley apps. Both were finance related roles and were related to what I ultimately decided to pursue from a career perspective. To be honest with you, at the time when I was doing this there weren’t many services out there that helped college kids find internships. I literally just cold called every single firm I thought could make room for me. If I recall I probably reached out to over 100 firms with a <10% hit rate but I eventually landed something. It takes a lot of work but it is definitely possible. Nowadays I would recommend networking and pinging people on LinkedIn.